<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type='primary' @click="addRolesVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区 -->
      <el-table :data='rolesList' border stripe>
        <!-- 展开列 -->
        <el-table-column type='expand'>
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span='5'>
                <el-tag  closable @close='removeRightById(scope.row,item1.id)'>{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>

              <!-- 渲染二级和三级权限 -->
              <el-col :span='19'>
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="['bdtop',i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span='6'>
                    <el-tag type='success'  closable @close='removeRightById(scope.row,item2.id)'>{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span='18'>
                    <el-tag type='warning' v-for="(item3) in item2.children" :key="item3.id" closable @close='removeRightById(scope.row,item3.id)'>
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{scope.row}}</pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type='index'></el-table-column>
        <el-table-column label='角色名称' prop='roleName'></el-table-column>
        <el-table-column label='角色描述' prop='roleDesc'></el-table-column>
        <el-table-column label='操作' width='300px'>
          <template slot-scope="scope">
            <el-button size='mini' type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button size='mini' type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
            <el-button size='mini' type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 添加用户对话框 -->
      <el-dialog title="添加角色" :visible.sync="addRolesVisible" width="50%" @close="addRoleClosed">
        <el-form ref="addRolesRef" :model="addRolesForm" label-width="90px" :rules='addRolesRules'>
          <el-form-item label="角色名称"  prop="roleName">
            <el-input v-model="addRolesForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述"  prop="roleDesc">
            <el-input v-model="addRolesForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addRolesVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRoles">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 修改用户对话框 -->
      <el-dialog title="提示" :visible.sync="editRolesVisible" width="50%" @close='editRolesClosed'>
        <el-form ref="editRolesRef" :model="addRolesForm" label-width="90px" :rules='addRolesRules'>
          <el-form-item label="角色名称"  prop="roleName">
            <el-input v-model="addRolesForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述"  prop="roleDesc">
            <el-input v-model="addRolesForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="editRolesVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRoles">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%">
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key='id' default-expand-all :default-checked-keys='defKeys'
      @close='setRightDialogClosed'
      ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  name: 'Roles',
  data() {
    return {
      // 所有角色列表数据
      rolesList:[],
      // 添加角色对话框的显示和隐藏
      addRolesVisible:false,
      // 添加角色的表单数据
      addRolesForm:{
        roleName:'',
        roleDesc:''
      },
      // 添加角色表单验证规则
      addRolesRules:{
        roleName:[
          { required: true, message: '请输入角色名称', trigger: 'blur' },
        ],
        roleDesc:[
          { required: true, message: '请输入角色描述', trigger: 'blur' },
        ],
      },
      // 修改用户对话框的显示和隐藏
      editRolesVisible:false,
      // 分配权限对话框的显示和隐藏
      setRightDialogVisible:false,
      // 所有权限的数据
      rightsList:[],
      // 树形控件的绑定对象
      treeProps:{
        // 属性内容值
        label:'authName',
        // 父子节点通过哪个属性嵌套
        children:'children'
      },
      // 默认选中的节点Id值数组
      defKeys:[],
      // 当前即将分配权限的角色id
      roleId:''
    }
  },
  components: {},
  methods: {
    // 获取所有数据的列表
    async getRolesList(){
      const {data:res} = await this.$http.get('roles')
      if(res.meta.status !== 200){
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
    },
    // 添加角色功能
    addRoles(){
      this.$refs.addRolesRef.validate(async valid => {
        if(!valid) return
        const {data:res} = await this.$http.post('roles',this.addRolesForm)
        if(res.meta.status !== 201){
          return this.$message.error('添加用户失败')
        }
        this.$message.success('添加用户成功')
        this.addRolesVisible = false
        this.getRolesList()
      })
    },
    // 监听添加角色对话框的关闭
    addRoleClosed(){
      this.$refs.addRolesRef.resetFields()
    },
    // 编辑角色对话框
    async showEditDialog(id){
      const {data:res} = await this.$http.get('roles/' + id)
      if(res.meta.status!== 200){
        return this.$message.error('用户获取失败')
      }
      this.addRolesForm = res.data
      this.editRolesVisible = true
    },
    // 编辑角色对话框的关闭
    editRolesClosed(){
      this.$refs.editRolesRef.resetFields()
    },
    // 编辑角色并提交
    editRoles(){
      this.$refs.editRolesRef.validate(async valid => {
        if(!valid) return
        const {data:res} = await this.$http.put(
          'roles/' + this.addRolesForm.roleId,
          {
            roleName:this.addRolesForm.roleName,
            roleDesc:this.addRolesForm.roleDesc
          }
        )
        if(res.meta.status!== 200){
          return this.$message.error('更新用户信息失败')
        }
        this.editRolesVisible = false
        this.getRolesList()
        this.$message.success('更新用户信息成功！')
      })
    },
    // 删除对应角色信息
    async removeRolesById(id){
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
      }).catch(err => err)
      if(confirmResult != 'confirm'){
        return this.$message.info('取消删除')
      }
      
      const {data:res} = await this.$http.delete('roles/' + id)
      if(res.meta.status !== 200){
        return this.$message.error('删除角色失败')
      }
      this.$message.success('删除角色成功')
      this.getRolesList()
    },
    // 三级数据中 根据id删除对应的权限
    async removeRightById(role,rightId){
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
      }).catch(err => err)
      if(confirmResult!== 'confirm'){
        return this.$message.info('取消删除')
      }
      // ${xx} 将xx转换为变量
      const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if(res.meta.status !== 200){
        return this.$message.error('删除权限失败')
      }
      this.$message.success('删除权限成功')
      // this.getRolesList() 会让界面重新刷新
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role){
      this.roleId = role.id
      // 获取所有权限的数据
      const {data:res} = await this.$http.get('rights/tree')
      if(res.meta.status !== 200){
        return this.$message.error('获取权限数据失败')
      }
      // 获取到的权限数据，保存到data中
      this.rightsList = res.data
      console.log(res.data)

      // 获取三级节点的id
      this.getLeafKeys(role,this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式 获取角色下所有三级权限的id，并保存到 defKeys 中
    getLeafKeys(node,arr){
      if(!node.children){
        // 如果当前节点不包含children属性，则是三级节点
        return arr.push(node.id)
      }
      node.children.forEach( item => 
        this.getLeafKeys(item,arr)
      )
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed(){
      // 关闭时清空一下存储的数组 defKeys
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights(){
      const keys = [
        // getCheckedKeys 已选中节点的 id 数组
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')

      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status !== 200){
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  },
  mounted() {
  },
  created(){
    this.getRolesList()
  }
}
</script>

<style lang='less' scope>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>